Allergy Asthma Immunol Res.  2019 Sep;11(5):644-654. 10.4168/aair.2019.11.5.644.

Survey of IgE Reactivity to Nonbiting Midges in Korea and Identification of IgE-Binding Protein

Affiliations
  • 1Department of Environmental Medical Biology, Arthropods of Medical Importance Resource Bank, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul, Korea. tsyong212@yuhs.ac
  • 2Department of Internal Medicine, Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea.

Abstract

PURPOSE
Chironomids (nonbiting midges) are widely and abundantly distributed near ponds, rivers, and artificially dammed pools used for irrigation. Chironomids contain allergens and cause airway allergy in humans. In this study, we aimed to examine the allergic potential of chironomids in inhabitants living near artificially dammed pools.
METHODS
We examined immunoglobulin E (IgE) reactivity to chironomid extracts in the sera of residents living around installed dams and assessed the correlations of IgE responses between chironomids (Chironomus flaviplumus, Chironomus kiiensis, Cricotopus bicinctus) and house dust mites (Dermatophagoides farinae). In addition, we identified potential IgE binding proteins specific for adult C. bicinctus, a popular species in Korea. Specific IgE antibodies in sera collected from the participants against the extracts were tested using enzyme-linked immunosorbent assay (ELISA).
RESULTS
The average IgE-positive rates were 10.4%, 8.1%, and 8.2% in C. bicinctus, C. flaviplumus, and C. kiiensis, respectively. The IgE-positive rate and IgE titer of C. bicinctus antigen were higher in residents living around installed dams than in those who lived other places (P = 0.013). Western blotting using sera having high IgE titers to C. bicinctus in ELISA showed the presence of a protein of approximately 42 kDa that was homologous to the actin protein isoform in C. bicinctus extracts as demonstrated using mass spectrometry.
CONCLUSIONS
Our results showed that people living near installed dams were more sensitized to C. bicinctus and that the 42 kDa IgE-binding protein could be useful for further studies on chironomid allergic disease and clinical applications.

Keyword

Nonbiting midges; IgE binding protein; allergy

MeSH Terms

Actins
Adult
Allergens
Antibodies
Blotting, Western
Chironomidae*
Enzyme-Linked Immunosorbent Assay
Galectin 3
Humans
Hypersensitivity
Immunoglobulin E*
Immunoglobulins
Korea*
Mass Spectrometry
Ponds
Pyroglyphidae
Rivers
Actins
Allergens
Antibodies
Galectin 3
Immunoglobulin E
Immunoglobulins
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